DEV: Update sassc gem

Gemfile.lock

@@ -145,7 +145,7 @@ GEM
       rake-compiler
     fast_xs (0.8.0)
     fastimage (2.1.5)
-    ffi (1.9.25)
+    ffi (1.10.0)
     flamegraph (0.9.5)
     fspath (3.1.0)
     gc_tracer (1.5.1)
@@ -320,8 +320,8 @@ GEM
     rake-compiler (1.0.4)
       rake
     rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
     rbtrace (0.4.11)
       ffi (>= 1.0.6)
       msgpack (>= 0.4.3)
@@ -381,15 +381,9 @@ GEM
       crass (~> 1.0.2)
       nokogiri (>= 1.8.0)
       nokogumbo (~> 2.0)
-    sass (3.5.6)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-    sassc (1.11.4)
-      bundler
-      ffi (~> 1.9.6)
-      sass (>= 3.3.0)
+    sassc (2.0.1)
+      ffi (~> 1.9)
+      rake
     sawyer (0.8.1)
       addressable (>= 2.3.5, < 2.6)
       faraday (~> 0.8, < 1.0)

lib/stylesheet/functions.rb

@@ -1,10 +1,10 @@
 module Stylesheet
   module ScssFunctions
     def asset_url(path)
-      SassC::Script::String.new("url('#{ActionController::Base.helpers.asset_url(path.value)}')")
+      SassC::Script::Value::String.new("url('#{ActionController::Base.helpers.asset_url(path.value)}')")
     end
     def image_url(path)
-      SassC::Script::String.new("url('#{ActionController::Base.helpers.image_url(path.value)}')")
+      SassC::Script::Value::String.new("url('#{ActionController::Base.helpers.image_url(path.value)}')")
     end
   end
 end